As some of my visitors have noticed, there have been some problems submitting comments around here. The preview form would remove your carefully input character entities/references, double hyphens were converted to em dashes, etc.
I finally got around to figuring out how to prevent the comment preview from ruining your work. You can still markup your comment with Markdown syntax though.
However, the ever increasing comment spamming has forced me to implement some countermeasures that require your browser to have referrer logging enabled. If you have that turned off, you won’t be able to post comments, something for which I am really sorry. If you can think of a clever workaround that will let legitimate commenters access the commenting scripts while keeping the trash out, please let me know.